Numerators of interleaved A063524(n) and A002427(n)/A006955(n).

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =0a(5) =-1a(6) =0a(7) =1a(8) =0a(9) =-3a(10) =0a(11) =5a(12) =0a(13) =-691a(14) =0a(15) =35a(16) =0a(17) =-3617a(18) =0a(19) =43867a(20) =0a(21) =-1222277a(22) =0a(23) =854513a(24) =0a(25) =-1181820455a(26) =0a(27) =76977927a(28) =0a(29) =-23749461029